Color: Black - Bluetooth V2.0 + EDR - Frequency: 2.4GHz - Can answer the call answer by press a button - Vibrates with incoming calls - Unique novelty gadget that prevents you from missing important calls - Cell phone anti-theft feature never forget your mobile with proximity vibrating alert - Digital clock display - Voltage: 3.6~4.2V - Current: 45mA - Stand-by time: up to 72 hours (manufacturer rated) - Built-in 350mAh lithium battery - Package includes: - 1 x Bluetooth bracelet - 1 x Data cable (72cm) - 1 x Power adapter (2-round-pin plug) - 1 x English manual